Riveting and pressing machine



(No Model.)

C. B. ALBREE. V RIVHTING AND PRESSING MACHINE. No. 558,140. PatentedA15 1. 14, 1896.

WITNESSES INVENTOR Jams/Mg AN DREW H GRAHAM PHOTOLITHRWASHINFI'ON, D.C

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U ITED STATES PATENT ()FFICE.

CHESTER B. ALBREE, OF ALLEGHENY, PENNSYLVANIA.

Rl-VETING AND PRESSING MACHINE.

SPECIFICATION forming part of Letters Patent no. 558,140, dated April14, 1896, Application filed January 9, 1896. Serial No. 574,904. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHESTER B. ALBREE, of Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Riveting and Pressin Machines, of which the following isa full, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification, in whichFigure 1 shows in side elevation a rivet ing-machine constructed inaccordance with my invention. Fig. 2 is afront elevation thereof. Fig. 3is a horizontal section on the line a: 00 of Fig. 1.

Like symbols indicate like parts in each.

My invention relates to an improvement adapted for use in machines forriveting by pressure or in machines applying pressure for other purposesin such manner that the greatest pressure is exerted at or near the endof the stroke, and although in this specification I describe theinvention particularly as applied to riveting-machines I do not in tendto limit myself thereto, but wish to cover its use for any purpose forwhich it may be adapted.

In the drawings, A represents the frame of the riveting-machine.

B is the riveting-plunger,which moves,vertically, in a suitable guide orhub O in the frame, and D E are the rivetingdies, the moving die D beingfixed to the plunger and the stationary die E being fixed to the frame.

The motor by which the plunger is actuated is a cylinder N, having areciprocating piston and apiston-rod M, operated by steam,

compressed air, or water, or any other type of motor, such as anelectric motor, or even hand-levers, for giving longitudinal motion tothe piston or other rod M may be employed.

N is a valve governed by a hand-lever N by means of which the operationof the motor maybe controlled. Power is transmitted from the motor tothe dieplunger through a lever or bar F, pivoted at one end at G to themachine-frame and at the other end pivoted to the upper end of theplunger B by means of a pin H, fitting in a somewhat elongated At theend of the piston-rod M there is preferably an antifriction-roller L,which rides upon the upper side of the lever F, and as this lever isinclined relatively to the path ger B and moving the die D toward itscompanion die E. To hold the roller L in contact with the lever duringsuch motion of the piston-rod and to take up the strain of the work, Iemploy a swinging arm K, pivoted at one end to the piston-rod at theaxis of the roller L and pivoted at the other end at J to bars or postsI I, which extend from the frame A and in effect constitute part of theframe. By reason of the use of said swinging arm when the piston-rod isprojected the roller at its end moves in the arc of a circle, (shownbydottted lines,) and the lat eral thrust thereon is taken up by theswinging arm and post. 7

O is a lifting-bar connecting the arm K at a point P to the lever F at apoint Q. This lifting-baris divided and fitted with a spring 19, so asto have some loose motion, the purpose being that when the piston-rod isretracted the retraction of the swinging arm K, acting through the rod0, will lift the lever F. v The operation of the machine is as follows:The work to be riveted is interposed between the dies D E, and the partsbeing in the position shown by full lines in Fig. 1 the cylinderN isoperated so as to projectthe pistonrod M, and the roller L, moving alongthe surface of the lever F, will force it down, thus moving the plungerB within its guide and pressing the moving die upon the rivet with greatpressure. The dotted lines in the drawings and the reference-figuresdesignated by the prime mark show the parts in the positions which theyoccupy at the end of the stroke.

The action of the inclined lever F with the end of the piston-rodrolling or sliding in contact therewith is such that the speed of motionof the plunger decreases as the plunger advances, and that the slowestmotion and the greatest pressure is exerted upon the work at the end ofthe stroke when the rivet is being finally upset and shaped and when thegreatest pressure is needed. 011 the return stroke of the piston thelever F is lifted by means of the lifting-rod O, and the parts are thusrestored to the positions shown in the drawings; but, although thelifting-rod is a convenient device for this purpose, it is notessential, for the same work can be performed by a spring, Weight, orother counterbalance acting upon the lever.

The advantages of my invention are many and will be apparent to thoseskilled in the art.

The apparatus which I have described is simple in construction, compact,durable, and easy to maintain in working order, and it affords means forriveting in the most effective manner, giving the greatest pressure atthe time when it is most needed and distributing the strains of workupon the proper parts of the machine.

I claim 1. A machine for pressing or riveting, comprising a plungerwhich carries the moving die or tool, mechanism such as a cylinderhaving a reciprocating part adapted to impart motion to the plunger, alever connected with the plunger and inclined to the path of motion ofsaid reciprocating part and in sliding contact therewith, and a swingingarm pivotally connected to the frame of the machine and connected alsowith said reciprocating part for holding the latter to its workingcontact with the lever, substantially as described.

2. A machine for pressing or riveting comprising a plunger which carriesthe moving die or tool, mechanism such as a cylinder having areciprocating part adapted to impart motion to the plunger, a leverconnected with the plunger and inclined to the path of mo tion of saidreciprocating part and in sliding contact therewith, a swinging armpivotally connected to the frame of the machine and connected also withsaid reciprocating part for holding the latter to its working contactwith the lever, and a roller bearing between said reciprocating part andthe lever, substantially as described.

3. A machine for pressing or riveting comprising a plunger which carriesthe moving die or tool, mechanism such as a cylinder having areciprocating part adapted to impart motion to the plunger, a leverconnected with the plunger and inclined to the path of motion of saidreciprocating part and in sliding contact therewith, a swinging armpivotally connected to the frame of the machine and connected also withsaid reciprocating part for holding the latter to its Working contactwith the lever, and a lifting rod or connection connecting the swingingarm with the lever, substantially as described.

4. A machine for pressing or riveting comprising a plunger which carriesthe moving die or tool, mechanism such as a cylinder having areciprocating part adapted to impart motion to the plunger, a barconnected with the plunger and inclined to the path of motion of saidreciprocating part and in sliding contact therewith, a swinging armpivotally connected to the frame of the machine and connected also withsaid reciprocating part for holding the latter to its working contactwith the bar, and a lifting rod or connection connecting the swingingarm with the bar, substantially as described.

In testimony whereof I have hereunto set my hand.

CHESTER B. ALBREE. lVitnesses:

G. I. HOLDSHIP, II. M. CoRwIN.

